﻿   <p>
      An <em>IfcEvent</em> is something
      that happens that triggers an action or response.
    </p>
    <blockquote class="history">
      HISTORY&nbsp; New entity in IFC4
    </blockquote>
    <p class="use-head">Use definitions</p>
    <p>
      <em>IfcEvent</em> is used to capture information about
      particular things that happen or that may happen.
      Particularly used in work plans (or process maps) they
      identify e.g. a point at which a message containing
      information may be issued or at which a rule or constraint
      is invoked.
    </p>	